Conventional lighting and HVAC will result in a more expensive renovation and a higher operating cost.In addition, you are more likely to have electrical issues because an old installation will be subject to high current and localized heating.Now you can ask your electrical contractor to size the new installation accordingly.This reduces the required capacity of electric panels, breakers and circuits, saving money upfront.The construction features of pre-war apartments increase the difficulty of electrical upgrades, compared to modern dwellings.
To illustrate the concept, assume you need a 3.3-kilowatt water heater that is available with both voltages: With the 110-V heater, you require a larger cable and the circuit will emit more heat.
In these cases, a dedicated electrical installation is often installed to avoid modifications to the main service entrance, which is generally much more expensive.
An example of this would be when on shareholder purchases low-efficiency heating and cooling equipment, and uses it for long hours.
When purchasing a pre-war apartment, get a professional opinion on the transformer and service entrance conditions.
Individual tenants can normally carry out upgrades up to their respective electric panel, but any installations located upstream from that point are the responsibility of the building owner.